Well heterozygous means Pp and the female has pp so it would be 50/50.
P p
p Pp pp
p Pp pp
A colorimetric method based on tetrazolium salts (e.g., MTT, XTT, CCK-8/WST-8) are especially useful for assaying the quantification of viable cells.
https://www.creative-bioarray.com/support/colorimetric-cell-viability-assay.htm
Bacterial genes are organized into operons, clusters of coregulated genes, that are regulated such that they are all turned on or off together.
3 chromosomes would be present. one mosquito makes up 6 chromosomes, so if split in half which would be the sperm/egg, the egg would have 3 chromosomes while the sperm has the other 3.
Answer: D. retroviruses
I hope that this helps you !